W+Jet : Jet mass : Jet mass

pythia8~8.165--1herwig7~7.0.4Array
(
    [0] => pythia8
    [1] => 8.165--1herwig7
    [2] => 7.0.4
)
Array
(
    [0] => Array
        (
            [0] => pythia8
            [1] => 8.165--1herwig7
        )

    [1] => Array
        (
            [0] => 7.0.4
        )

)
Array
(
    [pythia8] => Array
        (
            [0] => 8.165--1herwig7
        )

    [7.0.4] => Array
        (
            [0] => 
        )

)

pp @ 7000 GeV